Ain't no other man for Christina Aguilera! The Voice coach announced on Valentine's Day that she and her beau since 2010, film producer Rutler, are engaged. "He asked and I said……," the singer Tweeted alongside a pic of the pair holding hands to show off her ring. The couple met on the set of Aguilera's film Burlesque, where Rutler was a set assistant, and began dating after the star divorced music exec Jordan Bratman. "Matthew is a special person… He's the kind of person you could spend hours on the phone talking to and all of a sudden it's daylight," she told PEOPLE in 2010.